JPH06239002A - Paper delivery device of mimeograph printing apparatus - Google Patents

Abstract

PURPOSE:To provide upheaving members adequately in response to the presence or absence of the connection of a sorter and to perform the stable paper delivery all the time regardless of the presence or absence of the sorter connection without the manual attaching, removing and replacing works of the upheaving members. CONSTITUTION:Movable upheaving members 85, 101 and 109 are provided in the halfway of a paper delivery path for guiding printed paper into a paper delivery stage so that the members can be substantially moved in the up and down directions. The movable upheaving members are driven in the up and down directions with a cam-type driving means. The movable upheaving members are lowered when a sorter is connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet discharging device of a stencil printing apparatus, and more particularly, to a stencil printing apparatus in which a sorter is selectively connected to a printing sheet in a sheet discharging process in a cross section orthogonal to the sheet discharging direction. The present invention relates to a paper discharge device including a raised member that gives a curved shape.

[0002]

2. Description of the Related Art In a stencil printing machine, printed printing papers are discharged from a printing unit and stacked on a paper discharge tray at the end side of a paper discharge path with the print image surface as the upper surface.

When the leading edge of the printing paper droops downward in the process of discharging the printing paper to the paper discharging tray, the printing paper is placed on the upper surface of the printing paper placed on the paper discharging tray first, that is, the print image surface. Rubbing and ruining the print image on the printing paper placed on the paper ejection tray first, so a raised member is provided in the paper ejection path that guides the printed printing paper to the paper ejection tray. By giving the printing paper a U-shaped or W-shaped curve when viewed in a cross section orthogonal to the paper ejection direction, the apparent rigidity in the paper ejection direction (front-back direction) of the printing paper is increased, and the paper ejection is performed. It has already been proposed to prevent the leading edge of the printing paper from hanging down in the process, which is disclosed, for example, in Japanese Examined Patent Publication No. 58-46428 and Shokai 60-1.
No. 65347 and JP-A No. 61-217461.

[0004]

There is a stencil printing machine in which a sorter including forced paper conveyance by a belt conveyor or the like is selectively connected to the end side of a paper discharge passage in place of a paper discharge table.

In this stencil printing machine, when a sorter is not connected and paper is discharged to the paper discharge tray,
The ridge member effectively acts on the paper discharge, but when the sorter is connected, when the ridge member causes the printing paper to bend, the printing paper by the paper forced conveying device in the subsequent sorter is printed. Does not perform well, and causes paper jams in the sorter.

On the other hand, in the conventionally known sheet discharging device, the protruding member is fixedly arranged or is detachable and replaceable, and when the protruding member is fixedly arranged, It is not possible to change the height or easily remove the raised member. In the case where the raised member is replaceable, the height of the raised member can be changed by the user manually attaching and detaching the rising member, and the raising member can be removed, but in this case, Since the raised member can be freely attached / detached / replaced by the user, if the detachment / replacement / removal is not properly performed, the raised member may not be properly installed with respect to whether or not the sorter is connected, which may rather give a bad result. There is.

Further, in this case, since the raised member is replaced and removed manually, the operation is troublesome, and the work load imposed on the user when using the stencil printing machine is heavy. This is one of the causes of greatly reducing the evaluation of the stencil printing machine.

The present invention has been made by paying attention to the above-mentioned problems in the sheet discharging device of the conventional stencil printing apparatus, and does not require the manual operation of attaching / detaching and replacing the raised member. It is an object of the present invention to provide a paper ejection device of a stencil printing apparatus, in which a raised member is appropriately installed depending on whether or not a sorter is connected, and stable paper ejection is always performed regardless of whether or not a sorter is connected.

[0009]

SUMMARY OF THE INVENTION According to the present invention, the above-described object is provided in the middle of a paper discharge passage for carrying a printed printing paper so as to be substantially vertically movable, and A movable ridge member that gives a curve to a print sheet when viewed in a cross section orthogonal to the sheet discharge direction, and a movable ridge member that is driven substantially up and down to move the movable ridge member to either an ascending position or a descending position. The driving means to be selectively positioned and information regarding whether or not a sorter including a sheet forced conveying means is connected to the terminal end side of the sheet discharge path is taken in so that the movable protruding member is positioned at the lowered position when the sorter is connected. And a control device for controlling the operation of the drive means.

[0010]

According to the above-mentioned structure, the control device takes in information regarding the presence / absence of the sorter connection, and when the sorter is connected, the movable protruding member is positioned at the lowered position by the driving means.

[0011]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 shows an example of a stencil printing apparatus having a plate making function, to which the paper discharge apparatus according to the present invention is applied.
The stencil printing device with a plate making function shown in the drawing is a stencil plate printing device including a document reading section 11, a plate making section 13, and a printing section 15.
And have.

The document reading section 11 has a line image sensor 17 for reading an image of a document conveyed in the sub-scanning direction, and a document feeding roller 19.

The plate making unit 13 includes a base paper roll unit 21, a thermal head 23 composed of a plurality of dot-shaped heating elements arranged in a row, base paper feed rollers 25 and 27, and base paper guide rollers 29 and 31. , 33 and a base paper cutter 35, and a plurality of point heating elements of the thermal head 23 individually and selectively generate heat to form a heat sensitive perforation plate-making in a dot matrix manner on the heat-sensitive stencil base paper M. Then, the stencil sheet M after plate making is cut by the cutter 35.

The printing unit 15 has an ink permeable plate cylinder 37 having a porous structure, an ink supply device 39 arranged inside the plate cylinder 37, and a press roller 41, and an outer periphery of the plate cylinder 37. The stencil sheet M after plate making is wound and mounted.

A paper feed unit 43 is provided on one side of the printing unit 15.
A paper discharge unit 45 is provided on the other side of the printing unit 15.

The paper feed section 43 includes a paper feed table 47 on which the print paper sheets P are stacked and stacked, a paper feed roller 49 for taking out the print paper sheets P one by one from the paper feed table 47, and a plate cylinder 37 for the print paper sheets P.
And a timing roller 51 that sends the toner between the press roller 41 and the press roller 41.

The paper discharge section 45 has a peeling claw 53 for peeling the printing paper P from the plate cylinder 37, and a paper discharge device 55. The discharge device 55 is shown on the terminal side of the paper discharge device 55 in FIG. As described above, a sheet ejection tray 57 on which printed printing sheets P are stacked,
Either one of the sorters 59 as shown in FIG. 2 is exchangeably and selectively connected.

The sorter 59 is a sorter having a general structure of vertically moving bin, and has a belt conveyor 63 that receives the printing paper P discharged and conveyed by the paper discharge device 55 and forcibly conveys it to each bin 61. Have

Further, on one side of the printing unit 15, there is provided a plate discharging unit 69 including a plate discharging roller 67 for peeling the used stencil sheet M from the plate cylinder 37 and sending it into the plate discharging box 65.

In this stencil printing machine, the plate cylinder 37 is rotationally driven in the counterclockwise direction in the drawing around its own central axis by a rotation driving means (not shown), and the plate cylinder 37 is rotated.
The printing paper P is supplied between the plate cylinder 37 and the press roller 41 in a state where the printing paper P moves from the left side to the right side in FIG. The stencil printing is performed on the printing paper P by pressing P by the press roller 41 against the stencil sheet M wound around and mounted on the outer peripheral surface of the plate cylinder 37. The printed printing sheet P is stripped off the plate cylinder 37 by the stripping claws 53, and is discharged by the sheet discharging device 55.
The sheet is conveyed to the sheet No. 7, and is stacked on the sheet discharge tray 57 with the print image surface as the upper surface, or sent to the sorter 59.

The paper discharge device according to the present invention is the above-mentioned paper discharge device 5.
5 and one example of this is shown in FIGS. The paper discharge device 55 has a suction box 73 having a large number of suction holes 71 for negative pressure on its upper surface.

Pulley shafts 75 and 77 are rotatably provided in parallel with each other at both ends of the suction box 73 in the paper discharge direction (left and right direction in FIG. 5). Individual pulleys 79, 81 are attached.
An endless belt 83 made of rubber or the like is wound around the three pulleys 79 and 81. Endless belt 8
3 are provided in parallel with each other in the direction orthogonal to the sheet discharge direction, that is, in the width direction (hereinafter, this direction is referred to as the width direction), in total, three in the central portion of the suction box 73 and the left and right sides. The upper span of each endless belt 83 extends at a minute interval along the upper surface of the suction box 73, and
9 is driven to rotate in the clockwise direction in FIG. 5 by a driving device (not shown), and travels in the direction of arrow A along the upper surface of the suction box 73.

Although not shown, the endless belt 83 has a large number of small holes formed therein, and the suction holes 71 are formed in the endless belt 8.
Since the print paper P is placed on the upper span of the endless belt 83 and is conveyed by being located at the position corresponding to the extending position of No. 3, the print paper P is conveyed while being pressed against the upper span of the endless belt 83 by the negative pressure. It

Left and right main protruding members 85 are arranged on both sides in the width direction of the suction box 73 on the terminal end side in the sheet discharge direction. Each of the left and right main protruding members 85 has a three-dimensional inclined guide surface 87 having an upward slope as it goes toward the terminal end side in the paper discharge direction and outward as viewed in the width direction (left and right direction in FIG. 4). , One end of which is rotatably supported by a horizontal shaft 89 extending in the width direction in a substantially vertical direction, and is biased by a torsion spring 91 in the counterclockwise direction, that is, upward.

A cam shaft 93, which extends through the suction box 73 in the paper discharge direction in the paper discharge direction, is rotatably provided. The cam shaft 93 extends rotatably through the suction box 73. The left and right sides of the cam shaft 93 are fan-shaped main ridges. The member drive cam 95 is fixedly mounted. The main protruding member drive cams 95 engage with the cam engaging portions 97 integrally provided on the left and right main protruding members 85, and the left and right main protruding members 85 are indicated by solid lines in FIG. 4 by the rotation of the cam shaft 93. It is rotationally driven between the lowered position shown and the raised position shown by the phantom line in FIG.

Left and right auxiliary ridge plates 99 are arranged at positions adjacent to the widthwise central sides of the left and right main ridge members 85, respectively. Each of the left and right auxiliary raised plates 99 has an inclined guide upper surface 101 that is upwardly sloped toward the terminal end side in the sheet discharge direction, and one end thereof can be substantially vertically rotated by a horizontal shaft 103 extending in the width direction. It is pivotally supported.

Semicircular auxiliary ridge plate drive cams 105 are fixedly mounted on the left and right sides of the cam shaft 93. The auxiliary ridge plate drive cams 105 engage with the cam engaging pieces 107 integrally provided on the left and right auxiliary ridge plates 99, and the cam shaft 93.
The rotation of the left and right drive the left and right auxiliary raised plates 99 between the lowered position shown in FIG. 6 and the raised position shown in FIG.

A central ridge roller 109 is arranged at the widthwise central portion of the suction box 73 on the terminal end side in the paper discharge direction. The central raised roller 109 is directly below the upper span of the endless belt 83 at the central position and is rotatably supported by a roller support arm 113 by a pivot 111, and the roller support arm 113 is a horizontal shaft extending in the width direction in the middle portion. 11
5, it is rotatably supported in a substantially vertical direction, and is urged clockwise by a tension spring 117 as viewed in FIG.

A D-shaped roller support arm drive cam 119 is fixedly attached to the center of the cam shaft 93. The roller support arm drive cam 119 is used for the roller support arm 113.
Engaging with a cam follower roller 121 provided on the roller supporting arm 113, and by rotating the cam shaft 93, the roller supporting arm 113 is rotationally driven between the lowered position shown in FIG. 5 and the raised position shown in FIG. . When the roller support arm 113 is located at the lowered position, the central raised roller 109 is located at a position separated from the upper span of the endless belt 83 at the central position as shown in FIG. 1
The position of 13 in the raised position lifts the upper span of the endless belt 83 in the central position, as shown in FIG.

When the upper span of the endless belt 83 at the central position is lifted by the roller support arm 113, the printing paper P in the paper discharging process should be curved in a W shape (see FIG. 9). An auxiliary suction hole 72 is provided between the endless belt 83 at the center position on the terminal end side of the box 73 in the sheet discharge direction and the endless belts 83 on both left and right sides.

The main ridge member drive cam 95, the auxiliary ridge plate drive cam 105, and the roller support arm drive cam 119 are mounted on the cam shaft 93 with a predetermined rotation phase difference from each other, and the cam shaft 93 has a first rotation angle. Figure 5 when in the position
When all of the main ridge member 85, the auxiliary ridge plate 99, and the roller support arm 113 are in the lowered position (first state), as shown in FIG. 6, the main swelling member 85 and the roller support arm 113 are positioned in the raised position, and the auxiliary ridged plate 99 is positioned in the lowered position (second state).
When 3 is in the third rotation angle position, the main ridge member 85 and the auxiliary ridge plate 99 are located in the raised position and the roller support arm 113 is located in the lowered position as shown in FIG. State).

A gear 123 is attached to the cam shaft 93, and the gear 123 meshes with the gear 127 of the intermediate shaft 125. The intermediate shaft 125 is an endless belt 135 wound around a pulley 129 attached to the intermediate shaft 125 and a pulley 133 attached to the worm wheel shaft 131.
It is drivingly connected to the worm wheel shaft 131. Worm wheel 1 on the worm wheel shaft 131
37 is attached, the worm wheel 137
Engages with the worm 143 attached to the output shaft 141 of the cam drive motor 139,
It is rotationally driven by 9. As a result, the cam shaft 93 is selectively driven to rotate by the cam drive motor 139 at any one of the first rotation angle position, the second rotation angle position, and the third rotation angle position.

FIG. 8 shows an embodiment of a control system for the cam drive motor 139. This control system includes a CPU 201,
It includes a ROM 203 that stores a data file of an operation command of the cam drive motor 139 and a system program, which are defined in advance according to the paper type and the paper size, and a RAM 205 that stores input information as needed.

In this case, the operation command of the cam drive motor 139 is, for example, as shown in FIG. 9, that the sorter 59 is not connected and the print paper P is a standard paper having a general basis weight. When the paper size is A3 size, the first state is the standard paper with the paper type of the printing paper P being a general basis weight,
When the paper size is smaller than A3 size and larger than A size, the second state is the standard paper of the printing paper P having a general basis weight, and when the paper size is smaller than A4 size, the third state is the above. In the state, when the paper type of the printing paper P is thick and strong, the first state is irrespective of the paper size, and when the sorter 49 is connected, the first state is irrespective of the paper size and the paper type. One state is determined to be set.

The CPU 201 provides information regarding whether or not the sorter 59 is connected by the sorter connection detection switch 145 provided in the sorter connection section, and a sheet type input key which is a sheet type input operation section provided in the operation panel 147. 149 or the paper type detection device 151
Information regarding the sheet type of the print sheet P, and information regarding the sheet size of the print sheet P from the sheet size input key 153 or the sheet size detecting device 155 provided on the operation panel 147, and stores these in the RAM 205. The operation command of the cam drive motor 139 corresponding to the type and size of the printing paper P is read from the data file stored in the ROM 203, and the read operation command of the cam drive motor 139 is sent to the motor drive circuit 157 of the cam drive motor 139. An ON / OFF signal is given from two limit switches 161 and 163 that output and are switched on / off by a switch operation cam 159 attached to the cam shaft 93.
7, 159, the cam shaft 93 is rotationally displaced to any one of the first rotation angle position, the second rotation angle position, and the third rotation angle position by a combination of the on / off signals. Identifies and feedback-controlled camshaft 9
Control the rotation of 3.

As a result, the cam drive motor 139 determines whether or not the sorter 59 is connected, and the paper type input key 1
The type of printing paper P that is input by 49 or detected by the paper type detection device 151 and the paper size input key 1
It operates according to the size of the printing paper P input by 53 or detected by the paper size detecting device 155, and moves the cam shaft 93 to the first rotation angle position and the above-mentioned position according to the type and size of the printing paper P. It is rotationally driven to either the second rotation angle position or the third rotation angle position.

By rotating the cam shaft 93, it is determined whether or not the sorter 59 is connected, and the paper type input key 14
9 or the type of printing paper P detected by the paper type detection device 151 and the paper size input key 15
3 or the size of the printing paper P detected by the paper size detecting device 155, and the main ridge member 85 as shown in FIG. 5 according to the type and size of the printing paper P. In a first state in which all of the auxiliary ridge plate 99, the roller support arm 113, and the central ridge roller 109 are in the lowered position, the main ridge member 85, the roller support arm 113, and the central ridge roller 109 as shown in FIG. Is in the raised position and the auxiliary ridge plate 99 is in the lowered position, or the main ridge member 85 and the auxiliary ridge plate 99 are in the raised position as shown in FIG. Any of the third states in which the arm 113 and the central raised roller 109 are located in the lowered position is obtained.

As a result, when the sorter 59 is connected, regardless of the type and size of the printing paper P, as shown in FIG. 5, the main rising member 85, the auxiliary rising plate 99, the roller supporting arm 113, and the center are provided. The first state in which all of the swelling rollers 109 are located in the lowered position is obtained, and the printing paper P discharged and conveyed by the endless belt 83 is the main swelling member 8
5, the auxiliary ridge plate 99, and the central ridge roller 109 transfer to the belt conveyor 63 of the sorter 59 without being obstructed and conveyed to each bin 61 without trouble.

On the other hand, when the sorter 59 is not connected, the main ridge member 85, the auxiliary ridge plate 99, and the roller support arm 1 depend on the type and size of the printing paper P used.
The height positions of 13 and the central raised roller 109 are set appropriately so that stable paper discharge can always be performed.

The paper type detection device 151 may be constituted by a paper feed pressure switching setting lever and an interlocking switch in accordance with the paper type provided in the paper feed unit, and the paper size detection device 155 includes the paper feed unit. 43, or the size of the printing paper P in the paper feeding and discharging process may be detected by a photoelectric method, and when the paper feeding is performed by a cassette type, the type of the cassette is a photoelectric type, a magnet type. Anything that can be detected by a formula or the like may be used.

[0042]

As can be understood from the above description, according to the paper discharge device of the stencil printing machine of the present invention, the control device such as the CPU fetches the information regarding the presence / absence of the sorter connection and is movable by the driving means when the sorter is connected. Since the raised member is located in the lowered position, the raised member is properly installed according to the presence / absence of the sorter connection without the need to manually attach / detach the raised member, and is always stable regardless of the presence or absence of the sorter connection. The discharged paper will be discharged.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an example of a stencil printing device with a plate making function, to which a paper discharge device according to the present invention is applied, in a sorter unconnected state.

FIG. 2 is a schematic configuration diagram showing an example of a stencil printing device with a plate making function, which is suitable for application of the paper discharge device according to the present invention, in a sorter connected state.

FIG. 3 is a plan view showing an embodiment of a paper discharge device of the stencil printing apparatus according to the present invention.

FIG. 4 is a front view showing an embodiment of a paper discharge device of the stencil printing apparatus according to the present invention.

FIG. 5 is a side view showing an embodiment of a sheet discharging device of the stencil printing apparatus according to the present invention in a first state.

FIG. 6 is a side view showing an embodiment of a paper discharge device of the stencil printing machine according to the present invention in a second state.

FIG. 7 is a side view showing an embodiment of a sheet discharging device of the stencil printing device according to the present invention in a third state.

FIG. 8 is a block diagram showing an embodiment of a control system of the paper discharge device of the stencil printing machine according to the present invention.

FIG. 9 is an explanatory view showing an operation example of the paper discharge device of the stencil printing apparatus according to the present invention.

[Explanation of symbols]

 11 Document Reading Section 13 Plate Making Section 15 Printing Section 37 Plate Cylinder 41 Press Roller 43 Paper Feeding Section 45 Paper Ejecting Section 47 Paper Feeding Table 53 Ripper Claw 55 Paper Ejecting Device 57 Paper Ejecting Table 59 Sorter 63 Belt Conveyor 63 Plate Ejecting Section 73 Suction Box 71 Suction Hole 83 Endless Belt 85 Main Raising Member 93 Cam Shaft 95 Main Raising Member Driving Cam 99 Auxiliary Raising Plate 105 Auxiliary Raising Plate Driving Cam 109 Central Raising Roller 113 Roller Support Arm 119 Roller Support Arm Drive Cam 139 Cam Drive Motor 145 Sorter Connection Detection switch

Claims (1)

[Claims] 1. A curving structure is provided in a discharge path that conveys printed printing paper so as to be movable in a substantially vertical direction, and the printing paper in the discharging process is curved when viewed in a cross section orthogonal to the discharging direction. A movable protruding member for giving the movable protruding member, driving means for driving the movable protruding member substantially in the vertical direction to selectively position the movable protruding member at one of an ascending position and a descending position, and an end side of the sheet discharge path And a controller for controlling the operation of the drive means so that the movable protruding member is located at the lowered position when the sorter is connected to the sorter. A paper ejecting device for a stencil printing machine.